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Finding the Fourth Proportional to 343,423.40, 515,135.10 and 90,703.40

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Solution

The fourth proportional to 343,423.40, 515,135.10 and 90,703.40 is: 136,055.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,423.40 : 515,135.10 = 90,703.40 : x
  2. Step 2: Convert to fraction form
    343,423.40/515,135.10 = 90,703.40/x
  3. Step 3: Cross multiply
    343,423.40x = 515,135.10 × 90,703.40
  4. Step 4: Simplify right side
    343,423.40x = 46,724,505,029.34
  5. Step 5: Solve for x
    x = 46,724,505,029.34/343,423.40
  6. Step 6: Final answer
    x = 136,055.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.